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8183049 |
Method for detecting lead present in specimen
With respect to a lead detection method that uses rhodizonic acid, it is made possible to clearly identify pink or red coloration caused by a reaction between lead and rhodizonic acid even in cases...
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8133739 |
Reagent for measurement of concentration of lead, and method for measurement of concentration of lead
To provide a lead concentration determination reagent which realizes accurate, high-sensitivity, and simple-manner determination of the lead ion concentration (also referred to simply as “lead c...
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8114673 |
Sensor for oxidising agents
This invention relates to an irreversible indicator for detecting oxidizing agents, or in particular an oxygen indicator, comprising at least one redox-sensitive dyestuff, at least one...
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8049165 |
Saliva assay technique for heavy metal
A method for determining heavy metal loading in a subject includes collecting a saliva sample from the subject containing a concentration of a heavy metal. The saliva sample is subjected to...
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8012760 |
Sensor for direct measurement of carbonate ions in seawater
A system and associated methodology to directly measure the concentration of carbonate ions in seawater by ultraviolet absorbance spectroscopy. Metal ions are added to seawater and the absorbance...
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7960177 |
Set of calibration standards
A standard calibration set having at least three calibration standards. Each standard is a molded article made of a thermoplastic polymer which contains the elements Cd, Cr, Pb, Hg and Br, with the...
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7927879 |
Zirconium crucible for melting analytical sample, method of preparing analytical sample and method of analysis
Proposed is a zirconium crucible used for melting an analytical sample in the pretreatment of the analytical sample, wherein the purity of the zirconium crucible is 99.99 wt % or higher. In light...
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7842507 |
Sensor for direct measurement of carbonate ions in seawater
A system and associated methodology to directly measure the concentration of carbonate ions in seawater by ultraviolet absorbance spectroscopy. Metal ions are added to seawater and the absorbance...
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7829340 |
Oral fluid assays for the detection of heavy metal exposure
Methods for measuring the concentration of heavy metals such as lead in oral fluid are provided. The concentration of lead in oral fluid can be accurately correlated with the concentration of lead...
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7816142 |
Lead testing system
A system for testing multiple samples for the presence of lead includes a plurality of vessels, a plurality of plungers, a housing for removably storing the plurality of vessels, and a retainer for...
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7749765 |
Quantitative detection of lead in water
The present invention provides compositions and methods for extracting, isolating, and measuring lead dissolved in aqueous solutions, including water.
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7732218 |
Method for preparing analytical standard, and analytical standard prepared by the same
There is provided a method for preparing an analytical standard used for microbeam X-ray fluorescence analysis which includes: a mixing step in which an element is added to a base material, and the...
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7615377 |
Fluorescein-based metal sensors
The present invention is directed, in part, to fluorescein-based ligands for detection of metal ions, and methods of making and using the same.
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7273588 |
Methods of sampling halosilanes for metal analytes
Methods for determining the amount of at least one metal analyte present in a liquid or gas sample of a halosilane supply (e.g., a chlorosilane supply) are disclosed herein. A sample of a...
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6875615 |
Sensors for the determination of organometallic compounds
The present invention relates to sensors for the determination of organometallic compounds comprising the following elements: a) an inorganic, organic or polymeric support, insoluble in the sample...
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6492180 |
Non-invasive transdermal detection of analytes
A method and apparatus for non-invasive extraction and/or detection of chemicals such as heavy metals, drugs such as cocaine and analytes such as blood glucose has been developed. A patch or...
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6489170 |
Chemical spot test for lead in paint and other media
A one-step chemical spot test for the qualitative determination of lead in lead-based paint and other media. This test is based upon the reaction of lead with sodium rhodizonate under strong acid...
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6346418 |
Method for evaluation of metal impurity in lithographic materials
A method for evaluating ratios of metallic impurities in lithographic materials is disclosed. The method comprises: separating said metal from said lithographic material by microwave heating; then...
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6323036 |
Reagents and methods for releasing and measuring lead ions from biological matrices
The present invention provides a reagent for extracting lead ions from a variety of biological matrices such as human whole blood that has been anticoagulated with either heparin or EDTA, and...
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6248592 |
Method for measuring lead concentrations in blood
Method for measuring lead concentrations in blood. The present invention includes the use of resonant laser ablation to analyze ≤1 μL (or equivalent mass) samples of blood for lead content. A ty...
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6248593 |
Handwipe disclosing method for the presence of lead
A method of detecting lead contamination of a surface is disclosed. A handwipe issued to collect any lead contamination on the surface. The lead is solubilized with an aqueous acid solution and...
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6228651 |
Preparation of analytical samples, analysis of impurities, preparation of highly purified phosphoric acid and production of semiconductor devices
A process for the preparation of an analytical sample characterized by depositing and separating solely the impurity to be analyzed from phosphoric acid; a process for analysis of the impurity...
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6225128 |
Color test card package for testing for the presence of lead
A package comprises a sealed plastic envelope containing a small amount of desiccant sufficient to absorb the moisture in the air entrapped in the envelope. The package contains a dry test card...
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6225127 |
Enzyme-based fluorescence biosensor for chemical analysis
This invention generally relates to the detection, determination, and quantitation of certain ions and small molecules involving the quenching of a fluorescent label attached to a macromolecule,...
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6171552 |
Hydride formation analytical apparatus
The present invention provides for a hydride formation analytical apparatus which forms hydrides of target components contained in a sample liquid and then analyzes them. The hydride formation...
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6037182 |
Method for detecting a location of contaminant entry in a processing fluid production and distribution system
A method is used to detect a location of contaminant entry in a processing fluid production and distribution system. A wafer is placed in a clean container. The clean container is connected to a...
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5912180 |
Process and apparatus for testing for substances in liquids
A method for detecting a substance in a liquid sample involves precipitating a substance from the liquid sample and filtering it from the liquid sample. The precipitate is then tested for the...
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5683907 |
Metal ion-ligand coordination complexes, antibodies directed thereto, and assays using such antibodies
The present invention relates to the field of immunossays for metal ions. The invention presents: metal ion-ligand coordination complexes ("MLC"), novel ligands, antibodies specific for MLC,...
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5672257 |
Electrochemical metal analysis
Electrochemical heavy metal analysis includes a printed electrode having a layer of a mercury compound or salt supported thereon. The compound or salt is reduced to metallic mercury in use of the...
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5648268 |
Radionuclide exchange detection of ultra trace ionic impurities in water
The present invention is directed to an analytic method for detecting trace elements in fluid solution. A cation exchange resin is packed with a radiolabelled exchange material having certain...
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5558835 |
Lead test dauber
A device for testing for the presence of lead on a painted surface includes a porous dauber formed from an absorbent sintered plastic. The dauber is preimpregnated with a powdered mixture...
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5518886 |
Blood lead diagnostic assay
Diagnostic blood lead assays using porphobilinogen synthase protein function as an indicator of physiological response to lead exposure and as an indicator of the time period of lead exposure are...
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5514593 |
Time averaged toxic metals monitoring method
An improved device for monitoring the presence of toxic metals in workplace air comprises a base and a removable top assembly. The top assembly includes a test substrate, such as filter paper,...
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5496736 |
Process for testing for substances in liquids
A method and apparatus for the detection of nutrients and contaminants in a liquid sample. The sample is added to a container which is then capped with a cap assembly which contains crushable...
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5492835 |
Swab identification testing device and method
A testing apparatus and method for the immediate testing of painted surfaces to determine the type of paint and/or presence of mildews or lead wherein the apparatus includes an outer resealable...
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5468366 |
Colloidal-gold electrosensor measuring device
The present invention provides a new device for use in measuring lead levels in biological and environmental samples. Using square wave coulometry and colloidal gold particles impregnated on carbon...
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5459040 |
Enzyme amplified, complex linked, competitive and non-competitive assays for the detection of metal ions
Methods of assaying for the presence or amount of a metal ion in a sample suspected of containing such ions. In one aspect, an enzyme amplified sandwich assay is provided which relies upon the...
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5427953 |
Blood testing method
A method for testing blood samples for determining lead content therein. The method utilizes filter collection paper that is spotted with a blood sample; the blood sample spotted thereon is allowed...
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5368707 |
Convenient determination of trace lead in whole blood and other fluids
The invention relates to methods of determining micromolar levels of lead ion in various fluids, including blood. Detection of lead or other heavy metal ion concentrations as low as 1 μg/dL is ...
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5364792 |
Test swab and method of making and using same
A swab is impregnated with a test reagent such that a test for a specific substance can be effected by rubbing the impregnated swab over the surface to be tested and then viewing the swab for a...
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5354652 |
Lead assay
Lead assays using δ aminolevulinic acid dehydratase are disclosed.
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5330917 |
Test swab device and method of detecting lead, mercury, arsenic, and bismuth
A swab is impregnated with a test reagent such that a test for a specific substance can be effected by rubbing the impregnated swab over the surface to be tested and then viewing the swab for a...
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5294554 |
Analysis of tin, lead or tin-lead alloy plating solution
In electroless or electric tin, lead or tin-lead alloy plating solution which may contain copper, the concentration of a metal ion component selected from divalent tin ion, lead ion, and copper ion...
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5278075 |
Test swab to detect a substance on a surface and method of making and using same
A swab is impregnated with a test reagent such that a test for a specific substance can be effected by rubbing the impregnated swab over the surface to be tested and then viewing the swab for a...
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5232858 |
Method for quantitative determination of at least one chemical parameter of a sample medium
A method for the quantitative determination of one or more chemical parameters of a sample medium employs a fluorescent agent which is not responsive to the parameter to be determined and which has...
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5175110 |
Analysis of ions present at low concentrations in solutions containing other ions
A method of selectively and quantitatively removing and concentrating at least one selected ion from a multiple ion solution in which other ions are present is disclosed. The method comprises(a)...
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5039618 |
Test swab cartridge type device and method for detecting lead and cadmium
A swab is impregnated with a test reagent such that a test for a specific substance can be effected by rubbing the impregnated swab over the surface to be tested and then viewing the swab for a...
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5019516 |
Lead extraction and analysis
Techniques are described for extracting lead from a sample of potable water and analyzing for the amount of lead so extracted. A complexing agent is added to the water to form a complex with the...
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5010020 |
Quick color test to detect lead release from glaze and enamel coatings
A color test is presented for the purpose of quickly identifying glaze or enamel coatings which releases excessive Pb. Citric acid solution on filter paper is used to extract Pb from the coatings...
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4920057 |
Method for colorimetric analysis of metals
A portable test kit for colorimetric analysis of trace levels of dithizone-complexing metal cations including lead, is provided. The test kit includes storage tubes each of which contains the...
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